Multiple choice

If 4 examiners can examine a certain number of answer books in 8 days by working 5 hours a day for how many hours a day would 2 examiners have to work in order to examine twice the number of answer books in 20 days? यदि 4 परीक्षक 8 दिनों में प्रतिदिन 5 घंटे कार्य करते हुए कुछ उत्तर पुस्तिकाओं की जाँच करते है। 20 दिनों में प्रतिदिन कितने घंटे कार्य करते हुए 2 परीक्षक दुगुनी उत्तर पुस्तिकाओं की जाँच कर लेंगे ?

  1. 5 hours 5 घंटे

  2. 6 hours 6 घंटे

  3. 8 hours 8 घंटे

  4. 10 hours 10 घंटे

  5. 12 hours 12 घंटे
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C Correct answer
Explanation

Using work formula: M1×D1×H1 / W1 = M2×D2×H2 / W2. Given: 4×8×5 / W = 2×20×H / 2W. Simplifying: 160/W = 40H/2W, so H = 8 hours per day.

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